125130505 has 16 divisors (see below), whose sum is σ = 155771280. Its totient is φ = 96380928.

The previous prime is 125130503. The next prime is 125130517. The reversal of 125130505 is 505031521.

It can be written as a sum of positive squares in 8 ways, for example, as 3182656 + 121947849 = 1784^2 + 11043^2 .

It is a cyclic number.

It is not a de Polignac number, because 125130505 - 2¹ = 125130503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125130503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61789 + ... + 63781.

It is an arithmetic number, because the mean of its divisors is an integer number (9735705).

Almost surely, 2^125130505 is an apocalyptic number.

It is an amenable number.

125130505 is a deficient number, since it is larger than the sum of its proper divisors (30640775).

125130505 is a wasteful number, since it uses less digits than its factorization.

125130505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 125130505 is about 11186.1747259731. The cubic root of 125130505 is about 500.1739461451.

The spelling of 125130505 in words is "one hundred twenty-five million, one hundred thirty thousand, five hundred five".